How To Fix MDC_ADAPTER001 - Best Record Calculation must not run twice

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_ADAPTER - Messages for generic adapter implementations

• Message number: 001

• Message text: Best Record Calculation must not run twice

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_ADAPTER001 - Best Record Calculation must not run twice ?

  The SAP error message MDC_ADAPTER001: Best Record Calculation must not run twice typically occurs in the context of the SAP Master Data Consolidation (MDC) process. This error indicates that the system has detected an attempt to run the best record calculation process more than once simultaneously, which is not allowed.
  Cause:
  
  
  Concurrent Execution: The most common cause of this error is that the best record calculation process is being triggered multiple times concurrently. This can happen if:
  
  The process is manually started multiple times by users.
  There are automated jobs or background processes that are set to run the calculation at overlapping times.
  
  
  
  System Locking: The MDC framework may have internal locking mechanisms that prevent the same process from being executed simultaneously to ensure data integrity.
  
  
  Solution:
  
  
  Check Running Processes: Before starting the best record calculation, check if there are any existing processes running. You can do this by:
  
  Navigating to the relevant transaction (e.g., SM37 for job monitoring) to see if there are any active jobs related to the best record calculation.
  If you find any, wait for them to complete before starting a new calculation.
  
  
  
  Avoid Manual Triggers: Ensure that users are not manually triggering the best record calculation multiple times. Educate users on the proper procedure to avoid concurrent executions.
  
  
  Job Scheduling: If the calculation is scheduled as a background job, review the job scheduling to ensure that it does not overlap with other jobs. Adjust the scheduling times if necessary.
  
  
  System Configuration: If this error persists, it may be worth reviewing the system configuration or consulting with your SAP Basis team to ensure that there are no underlying issues with the MDC setup.
  
  
  Error Logs: Check the error logs for more detailed information about the error. This can provide insights into what might be causing the issue.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP documentation related to Master Data Consolidation and best record calculation for best practices and guidelines.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to resolve the MDC_ADAPTER001 error and ensure that the best record calculation process runs smoothly without conflicts.